CN104486159A - Inter-switch link time delay measuring method based on software defined network - Google Patents
Inter-switch link time delay measuring method based on software defined network Download PDFInfo
- Publication number
- CN104486159A CN104486159A CN201410790414.9A CN201410790414A CN104486159A CN 104486159 A CN104486159 A CN 104486159A CN 201410790414 A CN201410790414 A CN 201410790414A CN 104486159 A CN104486159 A CN 104486159A
- Authority
- CN
- China
- Prior art keywords
- openflow switch
- controller
- packet
- bag
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses an inter-switch link time delay measuring method based on a software defined network. The inter-switch link time delay measuring method comprises the following steps: installing an SDN controller C, an Openflow switch S1, and an Openflow switch S2; enabling the controller C to send a constructed Packet_Out packet to S1; when the Packet_Out packet arrives at S1, enabling S1 to analyze data from the Packet_Out packet, and forward the data from an eth0 interface of S1 to S2; enabling S2 to encapsulate the data packet into a Packet_In packet, and transmit back to the controller C; calculating first loop time by the controller C; in a similar way, sending the constructed Packet_Out packet to S2, and calculating second loop time by the controller C; creating a detecting packet by the controller C, sending the detecting packet to S1, forwarding the packet from an eth1 interface of S1, and returning the packet to the controller C, and sending the constructed detecting packet to S1 by the controller, so as to calculate the bidirectional time delay between the controller C and S2, and calculating the bidirectional time delay between S1 and S2.
Description
Technical field
This Technology design Network Measurement Technologies field, particularly a kind of ISL time-delay measuring method based on software defined network.
Background technology
Software defined network (SDN, Software-Defined Network) be a kind of novel network architecture, with legacy network unlike which proposing the thought be separated with data surface in network central control face, make the router in network and switch only need responsible forwarding, and do not need to do relevant routing decision and path learning etc. again.In SDN, be responsible for carrying out control and management to the overall situation, by issuing to each node the flow direction that stream table carrys out control data by centralized controller.Latency measurement major part in legacy network measures end to end, majority adopts the strategies such as statistics and estimation, lack certain real-time and accuracy, because the network configuration of SDN has larger change relative to legacy network, carry out except utilizing SNMP message in legacy network, end to end except latency measurement, utilizing the feature of SDN centralized control and Programmable Logic Controller can carry out latency measurement to the link in network between adjacent node more neatly.Existing SDN latency measurement technology comprises a kind of method of adding timestamp in detection packet, the method requires that the transmitting terminal switch of link to be measured sends detection packet continuously to receiving terminal switch, and add transmitting time stamp at transmitting terminal, receiving terminal switch receives detection packet and adds time of reception stamp, by calculating link One Way Delay to two timestamps simultaneously.But the method requires the SDN switch (adding timestamp in packet) possessing specific function, and the switch in common SDN does not possess this function, which results in the limitation of the method in the middle of application.
Summary of the invention
The object of the invention is to provide a kind of chain-circuit time delay method of measurement based on software defined network, directly can adopt generic hardware device into one, can realize measuring the chain-circuit time delay between switch in software defined network.
Technical scheme of the present invention is to provide a kind of ISL time-delay measuring method based on software defined network, it is characterized in that:
Step one: installation SDN controller C and Openflow switch S1, Openflow switch S2 is set, three equipment use netting twine interconnection, the eth0 interface inter-link of SDN controller C and Openflow switch S1 is set, the eth0 interface inter-link of SDN controller C and Openflow switch S2 is set, the eth1 interface of Openflow switch S1 and the eth1 interface inter-link of Openflow switch S2 are set, enter step 2;
Step 2: controller C constructs a Packet_Out bag, the action of setting Packet_Out bag is output, and the out_port of setting Packet_Out bag is eth0, enters step 3;
Step 3: controller C sends the Packet_Out bag of structure to Openflow switch S1, and the time stamp simultaneously recording current controller C is ts1, enters step 4;
Step 4: the Packet_Out bag of structure arrives Openflow switch S1, Openflow switch S1 parses data from Packet_Out bag, Reseal is general data bag, and performs action and forward from the eth0 interface of Openflow switch S1; General data bag arrives Openflow switch S2, and Openflow switch S2 installs to described general data encapsulating in a Pakcet_In bag and beams back again controller C, enters step 5;
Step 5: controller C receives the Packet_In bag that Openflow switch S2 sends, and records current time stamp te1, calculates the first loop time t=te1-ts1, enter step 6;
Step 6: controller C sends the Packet_Out bag of structure to Openflow switch S2, and the current time stamp of recording controller C is ts2 simultaneously, enters step 7;
Step 7: the Packet_Out bag of structure arrives Openflow switch S2, Openflow switch S2 parses data from Packet_Out bag, Reseal is general data bag, and performs action and forward from the eth0 interface of Openflow switch S2; General data bag arrives Openflow switch S1, and Openflow switch S1 installs to described general data encapsulating in a Pakcet_In bag and beams back again controller C, enters step 8;
Step 8: controller C receives the Packet_In bag that Openflow switch S1 sends, and records current time stamp te2, calculates second loop time t '=te2-ts2, enter step 9;
Step 9: controller C respectively issues a stream table respectively to Openflow switch S1 and Openflow switch S2, the source MAC that order enters from the eth1 interface of Openflow switch S1 and Openflow switch S2 is respectively that the packet of controller MAC Address of Network Card still forwards from the eth1 interface of Openflow switch S1 and Openflow switch S2, enters step 10;
Step 10: controller C constructs a detection packet, is sent to Openflow switch S1, records current controller time stamp t1 simultaneously, enters step 11;
Step 11: detection packet arrives Openflow switch S1, perform the action of stream table regulation, forward from the eth1 interface of Openflow switch S1 and get back to controller C, record current controller time stamp t1 ', two-way time delay then between controller C and Openflow switch S1 is t1 '-t1, enters step 12;
Step 12: controller C sends the detection packet of structure to Openflow switch S2, records current controller C time stamp t2 simultaneously, enters step 13;
Step 13: detection packet arrives Openflow switch S2, perform the action of stream table regulation, forward from the eth1 interface of Openflow switch S2 and get back to controller C, record current controller time stamp t2 ', two-way time delay then between controller C and Openflow switch S2 is t2 '-t2, enters step 14;
Step 14: the two-way time delay d=t+t ' between calculating Openflow switch S1 and Openflow switch S2-(t1 '-t1)-(t2 '-t2), export two-way time delay, method terminates.
Compared with prior art, tool of the present invention has the following advantages and effective effect:
(1) this method is different from the latency measurement in legacy network, specially for the network link level time-delay measuring method of SDN Environment Design, take full advantage of the feature of centralized control and Programmable Logic Controller in SDN, the round-trip delay of every section of link in network can be measured in real time, to network performance monitoring, the work such as network fault diagnosis have great help.And current legacy network is difficult to directly measure the performance parameters such as the time delay of every bar link.
(2) traditional OpenFlow agreement does not provide time stamp function, general purpose O penflow switch directly cannot beat time stamp to packet, therefore Openflow switchboard direct cannot be directly used to tap into latency measurement between row switch, the functional interface that this method provides based on OpenFlow agreement, without any need for customization Openflow exchange hardware equipment modify, do not need to do task repacking upgrading to existing SDN switch yet, the time delay of link between Openflow switch can be measured, therefore the present invention is applied widely, directly can adopt generic hardware device into one, equipment is not limited, cost is low.
(3) this method can utilize the controller from being specifically designed to measurement task to be responsible for, to reduce the load of master controller, can allow there is more than one controller in a SDN simultaneously, wherein the operation maintenance of whole network is responsible for by master controller, stream table issues, filtering rules etc. maintain the basic function of the network operation, another is from controller then operating measurement program, measurement function is independent from master controller, effectively reduce the work load of master controller, ensure the stable operation of network.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the invention process example, do simple introduction by the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing in the following describes is embodiments more of the present invention.
Fig. 1: based on the ISL time-delay measuring method system configuration schematic diagram of software defined network.
Fig. 2: based on the ISL time-delay measuring method flow chart of software defined network.
Embodiment
Below in conjunction with the accompanying drawing in the invention process example, be clearly and completely described the technical scheme in the invention process example, certainly described embodiment is only the present invention's part embodiment, instead of whole embodiments.
Embodiment 1
Based on a chain-circuit time delay method of measurement for software defined network, it is characterized in that:
Step one: installation SDN controller C and Openflow switch S1, Openflow switch S2 is set, SDN controller can be the controller types such as Floodlight, ryu, OpenDayLight, three equipment use netting twine interconnection, the eth0 interface inter-link of SDN controller C and Openflow switch S1 is set, the eth0 interface inter-link of SDN controller C and Openflow switch S2 is set, the eth1 interface of Openflow switch S1 and the eth1 interface inter-link of Openflow switch S2 are set
Wherein: SDN: the abbreviation being software defined network Software Defined Network, it is a kind of new network innovation framework, by network equipment chain of command and data surface being separated, achieves the flexible control of network traffics;
OpenFlow: be in SDN, most widely used one in numerous agreements of controller and switch communication;
Eth0, eth1: represent the ethernet port 0 on switch and ethernet port 1;
MAC Address: Media Access Control address, also known as hardware address, physical address, length is six bytes, be used for the position of define grid equipment, being arranged in the second layer data link layer of osi model, the corresponding globally unique MAC Address of each network interface card;
Enter step 2;
Step 2: controller C constructs a Packet_Out bag, the action of setting Packet_Out bag is output, and the out_port of setting Packet_Out bag is eth0,
Wherein Packet_Out message format is
struct ofp_packet_out {
Struct ofp_header header; / * head */
Uint32_t buffer_id; If/* data division has buffer memory on switches, be then buffer memory id;
If there is no buffer memory, be then-1.*/
Uint32_t in_port; / * bag input port or be set as controller */
Uint16_t actions_len; Length (unit byte) * of/* action lists/
Uint8_t pad [6]; / * filling */
Struct ofp_action_header actions [0]; / * action lists. */
/ * uint8_t data [0]; * // * only has and carries data when buffer_id==-1, and length is specified in head;
When buffer_id unequal to-1, do not carry data */
};
Enter step 3;
Step 3: controller C sends the Packet_Out bag of structure to Openflow switch S1, and the time stamp simultaneously recording current controller C is ts1, enters step 4;
Step 4: the Packet_Out bag of structure arrives Openflow switch S1, Openflow switch S1 parses data from Packet_Out bag, Reseal is general data bag, and performs action and forward from the eth0 interface of Openflow switch S1; General data bag arrives Openflow switch S2, because do not have corresponding stream list item in the stream table on S2, can trigger Packet_In event, and Openflow switch S2 installs to described general data encapsulating in a Pakcet_In bag and beams back again controller C,
Wherein Packet_In message format
struct ofp_packet_in {
Struct ofp_header header; / * head */
Uint32_t buffer_id; The buffer memory sequence number that/* switch is specified. */
Uint16_t total_len; The length of the whole bag of/*. */
Uint8_t reason; The reason * that/* Packet_In is formed/
Uint8_t table_id; / * be queried the sequence number * of table/
Uint64_t cookie; / * be queried stream list item cookie */
Struct ofp_match match; Coupling * during/* triggering Packet_In event/
//uint8_t pad [2]; / * filling */
//uint8_t data [0]; / * ethernet frame */
};
Enter step 5;
Step 5: controller C receives the Packet_In bag that Openflow switch S2 sends, and records current time stamp te1, calculates the first loop time t=te1-ts1, enter step 6;
Step 6: controller C sends the Packet_Out bag of structure to Openflow switch S2, and the current time stamp of recording controller C is ts2 simultaneously, enters step 7;
Step 7: the Packet_Out bag of structure arrives Openflow switch S2, Openflow switch S2 parses data from Packet_Out bag, Reseal is general data bag, and performs action and forward from the eth0 interface of Openflow switch S2; General data bag arrives Openflow switch S1, because there is no corresponding stream list item in the stream table on switch S1, can trigger Packet_In event, Openflow switch S1 installs to described general data encapsulating in a Pakcet_In bag and beams back again controller C, enters step 8;
Step 8: controller C receives the Packet_In bag that Openflow switch S1 sends, and records current time stamp te2, calculates second loop time t '=te2-ts2, enter step 9;
Step 9: controller C respectively issues a stream table respectively to Openflow switch S1 and Openflow switch S2, the source MAC that order enters from the eth1 interface of Openflow switch S1 and Openflow switch S2 is respectively that the packet of controller MAC Address of Network Card still forwards from the eth1 interface of Openflow switch S1 and Openflow switch S2, enters step 10;
Step 10: controller C constructs a detection packet, is sent to Openflow switch S1, records current controller time stamp t1 simultaneously, enters step 11;
Step 11: detection packet arrives Openflow switch S1, perform the action of stream table regulation, forward from the eth1 interface of Openflow switch S1 and get back to controller C, record current controller time stamp t1 ', two-way time delay then between controller C and Openflow switch S1 is t1 '-t1, enters step 12;
Step 12: controller C sends the detection packet of structure to Openflow switch S2, records current controller C time stamp t2 simultaneously, enters step 13;
Step 13: detection packet arrives Openflow switch S2, perform the action of stream table regulation, forward from the eth1 interface of Openflow switch S2 and get back to controller C, record current controller time stamp t2 ', two-way time delay then between controller C and Openflow switch S2 is t2 '-t2, enters step 14;
Step 14: the two-way time delay d=t+t ' between calculating Openflow switch S1 and Openflow switch S2-(t1 '-t1)-(t2 '-t2), export two-way time delay, method terminates.
Embodiment 2
Based on an ISL time-delay measuring method for software defined network, it is characterized in that:
Step one: installation SDN controller C and Openflow switch S1, Openflow switch S2 is set, three equipment use netting twine interconnection, the eth0 interface inter-link of SDN controller C and Openflow switch S1 is set, the eth0 interface inter-link of SDN controller C and Openflow switch S2 is set, the eth1 interface of Openflow switch S1 and the eth1 interface inter-link of Openflow switch S2 are set, enter step 2;
Step 2: controller C constructs a Packet_Out bag, the action of setting Packet_Out bag is output, and the out_port of setting Packet_Out bag is eth0, enters step 3;
Step 3: controller C sends the Packet_Out bag of structure to Openflow switch S1, and the time stamp simultaneously recording current controller C is ts1, ts1=5ms, enters step 4;
Step 4: the Packet_Out bag of structure arrives Openflow switch S1, Openflow switch S1 parses data from Packet_Out bag, Reseal is general data bag, and performs action and forward from the eth0 interface of Openflow switch S1; General data bag arrives Openflow switch S2, and Openflow switch S2 installs to described general data encapsulating in a Pakcet_In bag and beams back again controller C, enters step 5;
Step 5: controller C receives the Packet_In bag that Openflow switch S2 sends, and records current time stamp te1, te1=15ms, calculates the first loop time t=te1-ts1=15-5=10ms, enter step 6;
Step 6: controller C sends the Packet_Out bag of structure to Openflow switch S2, and the current time stamp of recording controller C is ts2, ts2=18ms simultaneously, enters step 7;
Step 7: the Packet_Out bag of structure arrives Openflow switch S2, Openflow switch S2 parses data from Packet_Out bag, Reseal is general data bag, and performs action and forward from the eth0 interface of Openflow switch S2; General data bag arrives Openflow switch S1, and Openflow switch S1 installs to described general data encapsulating in a Pakcet_In bag and beams back again controller C, enters step 8;
Step 8: controller C receives the Packet_In bag that Openflow switch S1 sends, and records current time stamp te2, te2=29ms, calculates second loop time t '=te2-ts2=29-18=11ms, enter step 9;
Step 9: controller C respectively issues a stream table respectively to Openflow switch S1 and Openflow switch S2, the source MAC that order enters from the eth1 interface of Openflow switch S1 and Openflow switch S2 is respectively that the packet of controller MAC Address of Network Card still forwards from the eth1 interface of Openflow switch S1 and Openflow switch S2, enters step 10;
Step 10: controller C constructs a detection packet, is sent to Openflow switch S1, and record current controller time stamp t1, t1=30ms, enters step 11 simultaneously;
Step 11: detection packet arrives Openflow switch S1, perform the action of stream table regulation, forward from the eth1 interface of Openflow switch S1 and get back to controller C, record current controller time stamp t1 '=33ms, two-way time delay then between controller C and Openflow switch S1 is t1 '-t1=33-30=3ms, enters step 12;
Step 12: controller C sends the detection packet of structure to Openflow switch S2, record current controller C time stamp t2, t2=35ms, enters step 13 simultaneously;
Step 13: detection packet arrives Openflow switch S2, perform the action of stream table regulation, forward from the eth1 interface of Openflow switch S2 and get back to controller C, record current controller time stamp t2 ', t2 '=40ms, two-way time delay then between controller C and Openflow switch S2 is t2 '-t2=40-35=5ms, enters step 14;
Step 14: the two-way time delay d=t+t ' between calculating Openflow switch S1 and Openflow switch S2-(t1 '-t1)-(t2 '-t2)=10+11-(33-30)-(40-35)=13ms, the two-way round-trip delay exporting link between Openflow switch S1 and Openflow switch S2 is 13ms, and method terminates.
Claims (1)
1., based on an ISL time-delay measuring method for software defined network, it is characterized in that:
Step one: installation SDN controller C and Openflow switch S1, Openflow switch S2 is set, three equipment use netting twine interconnection, the eth0 interface inter-link of SDN controller C and Openflow switch S1 is set, the eth0 interface inter-link of SDN controller C and Openflow switch S2 is set, the eth1 interface of Openflow switch S1 and the eth1 interface inter-link of Openflow switch S2 are set, enter step 2;
Step 2: controller C constructs a Packet_Out bag, the action of setting Packet_Out bag is output, and the out_port of setting Packet_Out bag is eth0, enters step 3;
Step 3: controller C sends the Packet_Out bag of structure to Openflow switch S1, and the time stamp simultaneously recording current controller C is ts1, enters step 4;
Step 4: the Packet_Out bag of structure arrives Openflow switch S1, Openflow switch S1 parses data from Packet_Out bag, Reseal is general data bag, and performs action and forward from the eth0 interface of Openflow switch S1; General data bag arrives Openflow switch S2, and Openflow switch S2 installs to described general data encapsulating in a Pakcet_In bag and beams back again controller C, enters step 5;
Step 5: controller C receives the Packet_In bag that Openflow switch S2 sends, and records current time stamp te1, calculates the first loop time t=te1-ts1, enter step 6;
Step 6: controller C sends the Packet_Out bag of structure to Openflow switch S2, and the current time stamp of recording controller C is ts2 simultaneously, enters step 7;
Step 7: the Packet_Out bag of structure arrives Openflow switch S2, Openflow switch S2 parses data from Packet_Out bag, Reseal is general data bag, and performs action and forward from the eth0 interface of Openflow switch S2; General data bag arrives Openflow switch S1, and Openflow switch S1 installs to described general data encapsulating in a Pakcet_In bag and beams back again controller C, enters step 8;
Step 8: controller C receives the Packet_In bag that Openflow switch S1 sends, and records current time stamp te2, calculates second loop time t '=te2-ts2, enter step 9;
Step 9: controller C respectively issues a stream table respectively to Openflow switch S1 and Openflow switch S2, the source MAC that order enters from the eth1 interface of Openflow switch S1 and Openflow switch S2 is respectively that the packet of controller MAC Address of Network Card still forwards from the eth1 interface of Openflow switch S1 and Openflow switch S2, enters step 10;
Step 10: controller C constructs a detection packet, is sent to Openflow switch S1, records current controller time stamp t1 simultaneously, enters step 11;
Step 11: detection packet arrives Openflow switch S1, perform the action of stream table regulation, forward from the eth1 interface of Openflow switch S1 and get back to controller C, record current controller time stamp t1 ', two-way time delay then between controller C and Openflow switch S1 is t1 '-t1, enters step 12;
Step 12: controller C sends the detection packet of structure to Openflow switch S2, records current controller C time stamp t2 simultaneously, enters step 13;
Step 13: detection packet arrives Openflow switch S2, perform the action of stream table regulation, forward from the eth1 interface of Openflow switch S2 and get back to controller C, record current controller time stamp t2 ', two-way time delay then between controller C and Openflow switch S2 is t2 '-t2, enters step 14;
Step 14: the two-way time delay d=t+t ' between calculating Openflow switch S1 and Openflow switch S2-(t1 '-t1)-(t2 '-t2), export two-way time delay, method terminates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410790414.9A CN104486159A (en) | 2014-12-18 | 2014-12-18 | Inter-switch link time delay measuring method based on software defined network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410790414.9A CN104486159A (en) | 2014-12-18 | 2014-12-18 | Inter-switch link time delay measuring method based on software defined network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104486159A true CN104486159A (en) | 2015-04-01 |
Family
ID=52760666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410790414.9A Pending CN104486159A (en) | 2014-12-18 | 2014-12-18 | Inter-switch link time delay measuring method based on software defined network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104486159A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852828A (en) * | 2015-04-30 | 2015-08-19 | 华为技术有限公司 | Network delay detection method, device and system |
| CN105429822A (en) * | 2015-11-30 | 2016-03-23 | 东南大学 | Software defined network based method for measuring link packet loss at each hop on peer-to-peer path |
| CN105591912A (en) * | 2015-07-21 | 2016-05-18 | 杭州华三通信技术有限公司 | Forwarding path selection method and device |
| CN105791113A (en) * | 2016-02-25 | 2016-07-20 | 上海斐讯数据通信技术有限公司 | SDN (Software Defined Network)-based multi-link delay equalization method and system |
| CN105933184A (en) * | 2016-06-17 | 2016-09-07 | 中国人民解放军国防科学技术大学 | SDN (Software Defined Network) link delay measuring method based on LLDP (Link Layer Discovery Protocol) |
| CN106817269A (en) * | 2015-12-01 | 2017-06-09 | 中国电信股份有限公司 | Internet monitoring method and system and relevant device |
| CN107294810A (en) * | 2017-07-14 | 2017-10-24 | 山东省计算中心（国家超级计算济南中心） | A kind of network delay measurement optimization method under software defined network environment |
| US9955447B2 (en) | 2016-03-01 | 2018-04-24 | Industrial Technology Reseearch Institute | Clock synchronization method, mobile network system, network controller and network switch |
| CN108289099A (en) * | 2018-01-24 | 2018-07-17 | 中国人民大学 | A kind of time-based SDN network fine granularity control information detection method |
| CN108449230A (en) * | 2018-03-15 | 2018-08-24 | 达闼科技（北京）有限公司 | Network performance detecting system, method and relevant apparatus |
| CN109150646A (en) * | 2017-06-28 | 2019-01-04 | 华为技术有限公司 | Link state detection system, method and apparatus |
| CN114726762A (en) * | 2022-03-24 | 2022-07-08 | 新华三技术有限公司 | Time delay measuring method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259685A (en) * | 2013-05-24 | 2013-08-21 | 杭州华三通信技术有限公司 | Method for detecting link failures and network equipment |
| CN103685279A (en) * | 2013-12-18 | 2014-03-26 | 东南大学 | Self-adapting-based network port fast scanning method |
| CN103795596A (en) * | 2014-03-03 | 2014-05-14 | 北京邮电大学 | Programmable control SDN measuring system and method |
| US20140241344A1 (en) * | 2013-02-27 | 2014-08-28 | Mellanox Technologies Ltd. | Direct updating of network delay in synchronization packets |
-
2014
- 2014-12-18 CN CN201410790414.9A patent/CN104486159A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140241344A1 (en) * | 2013-02-27 | 2014-08-28 | Mellanox Technologies Ltd. | Direct updating of network delay in synchronization packets |
| CN103259685A (en) * | 2013-05-24 | 2013-08-21 | 杭州华三通信技术有限公司 | Method for detecting link failures and network equipment |
| CN103685279A (en) * | 2013-12-18 | 2014-03-26 | 东南大学 | Self-adapting-based network port fast scanning method |
| CN103795596A (en) * | 2014-03-03 | 2014-05-14 | 北京邮电大学 | Programmable control SDN measuring system and method |
Non-Patent Citations (1)
| Title |
|---|
| 尚休新: "《基于OpenFlow网络的QoS保障子系统研究》", 《万方数据企业知识服务平台》 * |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852828B (en) * | 2015-04-30 | 2018-06-15 | 华为技术有限公司 | A kind of network delay detection method, apparatus and system |
| CN104852828A (en) * | 2015-04-30 | 2015-08-19 | 华为技术有限公司 | Network delay detection method, device and system |
| CN105591912A (en) * | 2015-07-21 | 2016-05-18 | 杭州华三通信技术有限公司 | Forwarding path selection method and device |
| CN105591912B (en) * | 2015-07-21 | 2019-08-06 | 新华三技术有限公司 | A kind of selection method and device of forward-path |
| CN105429822A (en) * | 2015-11-30 | 2016-03-23 | 东南大学 | Software defined network based method for measuring link packet loss at each hop on peer-to-peer path |
| CN105429822B (en) * | 2015-11-30 | 2018-07-20 | 东南大学 | Hop-by-hop packet loss of link measurement method on end-to-end path based on software defined network |
| CN106817269A (en) * | 2015-12-01 | 2017-06-09 | 中国电信股份有限公司 | Internet monitoring method and system and relevant device |
| CN106817269B (en) * | 2015-12-01 | 2020-03-20 | 中国电信股份有限公司 | Network layer monitoring method and system and related equipment |
| CN105791113A (en) * | 2016-02-25 | 2016-07-20 | 上海斐讯数据通信技术有限公司 | SDN (Software Defined Network)-based multi-link delay equalization method and system |
| CN105791113B (en) * | 2016-02-25 | 2019-11-29 | 上海斐讯数据通信技术有限公司 | A kind of multilink delay equalization method and system based on SDN |
| US9955447B2 (en) | 2016-03-01 | 2018-04-24 | Industrial Technology Reseearch Institute | Clock synchronization method, mobile network system, network controller and network switch |
| CN105933184A (en) * | 2016-06-17 | 2016-09-07 | 中国人民解放军国防科学技术大学 | SDN (Software Defined Network) link delay measuring method based on LLDP (Link Layer Discovery Protocol) |
| CN109150646B (en) * | 2017-06-28 | 2022-05-06 | 华为云计算技术有限公司 | Link state detection system, method and device |
| CN109150646A (en) * | 2017-06-28 | 2019-01-04 | 华为技术有限公司 | Link state detection system, method and apparatus |
| CN107294810B (en) * | 2017-07-14 | 2020-01-17 | 山东省计算中心（国家超级计算济南中心） | Network delay measurement optimization method under software defined network environment |
| CN107294810A (en) * | 2017-07-14 | 2017-10-24 | 山东省计算中心（国家超级计算济南中心） | A kind of network delay measurement optimization method under software defined network environment |
| CN108289099A (en) * | 2018-01-24 | 2018-07-17 | 中国人民大学 | A kind of time-based SDN network fine granularity control information detection method |
| CN108289099B (en) * | 2018-01-24 | 2021-07-02 | 中国人民大学 | SDN fine-grained control information detection method based on time |
| CN108449230B (en) * | 2018-03-15 | 2020-07-03 | 达闼科技（北京）有限公司 | Network performance detection system, method and related device |
| CN108449230A (en) * | 2018-03-15 | 2018-08-24 | 达闼科技（北京）有限公司 | Network performance detecting system, method and relevant apparatus |
| CN114726762A (en) * | 2022-03-24 | 2022-07-08 | 新华三技术有限公司 | Time delay measuring method and device |
| CN114726762B (en) * | 2022-03-24 | 2023-11-03 | 新华三技术有限公司 | Time delay measurement method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104486159A (en) | Inter-switch link time delay measuring method based on software defined network | |
| Tan et al. | In-band network telemetry: A survey | |
| KR101911579B1 (en) | Controller driven oam for openflow | |
| EP3259888B1 (en) | High-precision packet train generation | |
| CN103069754B (en) | Communication unit, communication system, communication means and recording medium | |
| US9438503B2 (en) | Network services testing with pluggable transceivers | |
| EP2398188A1 (en) | Method of Remote Active Testing of a Device or Network | |
| CN104509032A (en) | Operations, administration, and management (OAM) functions in a software defined network | |
| CN105515895A (en) | Method for measuring hop-by-hop delay on end-to-end path based on software-defined network | |
| US20220116304A1 (en) | Methods, systems and computer readable media for active queue management | |
| CN104917641A (en) | Method, device and system for testing packet loss | |
| CN109428816A (en) | Link protection method, device and storage medium | |
| GB2594127A (en) | Methods, systems, and computer readable media for measuring schedule update time for a time aware shaper implementation | |
| CN105637817B (en) | Control equipment, system and transmission channel control method in software defined network | |
| CN109391494A (en) | A kind of communication means, equipment and storage medium | |
| CN113541845B (en) | Power communication relay protection service time delay control method and system and relay protection equipment | |
| JP6231453B2 (en) | Communication control device | |
| CN107005440A (en) | A kind of method of link failure positioning, apparatus and system | |
| CN104468228A (en) | OAM message transmission system | |
| CN104394025A (en) | OAM (Operation, Administration and Maintenance) message sending method | |
| EP2898630B1 (en) | Network services testing with pluggable transceivers | |
| CN204392271U (en) | A kind of OAM message transmitting system | |
| Cai et al. | Packet level modeling and simulation of real-time ethernet protocols for smart grids | |
| Cai et al. | Periodic Subflow-based Proactive Flow Installation Mechanism in SDN-based IoT | |
| Kannan | Improving Network Diagnostics Using Programmable Networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150401 |
|
| WD01 | Invention patent application deemed withdrawn after publication |